KAFKA-10180: Fix security_config caching in system tests (#8917)
KAFKA-10180: Fix security_config caching in system tests (#8917)

Reviewers: Jun Rao <3b8fe158618db0e3f4afb5782d706a350bebb0b8@gmail.com>
guozhangwang/kafka,TiVo/kafka,Chasego/kafka,guozhangwang/kafka,apache/kafka,lindong28/kafka,lindong28/kafka,Chasego/kafka,TiVo/kafka,apache/kafka,apache/kafka,apache/kafka,guozhangwang/kafka,Chasego/kafka,guozhangwang/kafka,Chasego/kafka,lindong28/kafka,lindong28/kafka,TiVo/kafka,TiVo/kafka